#ifndef __USER_CALL_H__
#define __USER_CALL_H__

extern int fork(void);
extern void sleep(unsigned int time);
extern void msleep(unsigned int time);
extern int printf(char *fmt, ...);
extern long write(int fd, char *buf, long len);
extern long read(int fd, char *buf, long len);
extern int open(char *path, unsigned int flags, unsigned int mode);

#endif